com.vaadin.sass.internal.parser.function.RectFunctionGenerator Maven / Gradle / Ivy

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A pure Java implementation of the http://sass-lang.com compiler
There is a newer version: 0.9.13
/*
 * Copyright 2000-2014 Vaadin Ltd.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.vaadin.sass.internal.parser.function;

import static org.w3c.css.sac.LexicalUnit.SAC_CENTIMETER;
import static org.w3c.css.sac.LexicalUnit.SAC_EM;
import static org.w3c.css.sac.LexicalUnit.SAC_EX;
import static org.w3c.css.sac.LexicalUnit.SAC_INCH;
import static org.w3c.css.sac.LexicalUnit.SAC_MILLIMETER;
import static org.w3c.css.sac.LexicalUnit.SAC_PICA;
import static org.w3c.css.sac.LexicalUnit.SAC_PIXEL;
import static org.w3c.css.sac.LexicalUnit.SAC_POINT;

import com.vaadin.sass.internal.parser.ActualArgumentList;
import com.vaadin.sass.internal.parser.LexicalUnitImpl;
import com.vaadin.sass.internal.parser.ParseException;
import com.vaadin.sass.internal.parser.SCSSLexicalUnit;
import com.vaadin.sass.internal.parser.SassListItem;

public class RectFunctionGenerator extends AbstractFunctionGenerator {

    public RectFunctionGenerator() {
        super("rect");
    }

    @Override
    public SassListItem compute(LexicalUnitImpl function) {

        ActualArgumentList params = function.getParameterList();
        for (int i = 0; i < params.size(); i++) {
            boolean paramOk = true;
            SassListItem item = params.get(i);
            if (!(item instanceof LexicalUnitImpl)) {
                throw new ParseException(
                        "Only simple values are allowed as rect() parameters: "
                                + params);
            }
            LexicalUnitImpl lui = (LexicalUnitImpl) item;
            if (lui.getLexicalUnitType() == SCSSLexicalUnit.SAC_INTEGER
                    && lui.getIntegerValue() != 0) {
                paramOk = false;
            } else if (lui.getLexicalUnitType() == SCSSLexicalUnit.SAC_IDENT
                    && !"auto".equals(lui.getStringValue())) {
                paramOk = false;
            } else if (!LexicalUnitImpl.checkLexicalUnitType(lui, SAC_EM,
                    SAC_EX, SAC_PIXEL, SAC_CENTIMETER, SAC_MILLIMETER,
                    SAC_INCH, SAC_POINT, SAC_PICA)) {
                paramOk = false;
            }
            if (!paramOk) {
                throw new ParseException(
                        "The following value is not accepted as a parameter for rect(): "
                                + item);
            }
        }
        if (params.size() == 4) {
            return LexicalUnitImpl.createRect(function.getLineNumber(),
                    function.getColumnNumber(), params);
        } else {
            return LexicalUnitImpl.createFunction(function.getLineNumber(),
                    function.getColumnNumber(), "rect", params);
        }

    }
}